Again, I am so sorry to hear about Musti.
I forgot to say in my first post that at one time my kitty (Kedi is his name), used to go out on my 3rd story balcony. I had to stop letting him out there because on 2 separate occassions I found him dangling by his front feet off the side of the railing. He would get too excited about a bird or another cat and 'forget' where he was.
I was very lucky that nothing happened to him, so I know how you must feel.
Please take care and know we are all thinking of you here at Pet Talk.